amiad Filtomat MG112 Manual

MG112 910101-000516 / 06.2019 Page 1 of 31
AMIAD Water Systems Ltd.
Filtomat MG112
Electronically Controlled
Serial Number:
Order Number:
Catalog Number:
Filtration Degree:
Tested By:
Installation, Operation and Maintenance
Instructions
Ref: 910101-000516 /06.2019
Original Instructions

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AMIAD Water Systems Ltd.
Filtomat MG112 Electronically Controlled
This document is the user-manual of the Filtomat MG112 Electronically Controlled filter. It describes the installation, the
operation and the maintenance procedures of the filter.
Disclaimer:
Copyright © 2018 Amiad Water Systems Ltd. All rights reserved.
The contents of this document, including without limitation all information and materials, images, illustrations, data, drawings, names and any other
such materials that appear in this document are the sole property of Amiad Water Systems Ltd., including any intellectual property rights, whether
registered or not, and all know-how contained or embodied therein. Amiad may alter, remove or change the Content without any further notice. You
may not reproduce, copy, modify, create derivative works from, sell or participate in any sale of, or exploit in any way, in whole or in part, any of this
document or its content.
The confidential nature of and/or privilege in the file enclosed is not waived or lost as a result of a mistake or error in this file.If you received this file in
error, please notify Amiad immediately at [email protected]m.
This document does not replace any certified drawing, procedure or information provided by Amiad in reference to a specific customer, site or project.
Amiad assumes that all users understand risks involved within this file and/or its attached materials.This document is given in good faith and is not
intended to impose any obligation to Amiad. While every effort has been made to ensure the information in this manual is accurate and complete, we
would appreciate if you can bring any errors or omissions to the knowledge of Amiad or consult Amiad experts or its authorized representatives if you
have any questions.
Amiad Water Systems Ltd. D.N. Galil Elyon 1, 1233500, Israel Tel: [phone] | Fax: [phone] Email: i[email protected]

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TABLE OF CONTENTS
TECHNICAL SPECIFICATIONS....................................................................................................................................................4
SAFETY INSTRUCTIONS............................................................................................................................................................5
DIMENSIONAL DRAWINGS......................................................................................................................................................8
INTRODUCTION........................................................................................................................................................................9
GENERAL DESCRIPTION...............................................................................................................................................................9
BASIC FILTER OPERATION............................................................................................................................................................9
HOW THE SELF-CLEANING CYCLE WORKS ......................................................................................................................................9
HOW THE FLUSHING CONTROLLER WORKS..........................................................................................................................11
HOW THE HYDRAULIC RELAY WORKS ..........................................................................................................................................11
INSTALLATION........................................................................................................................................................................12
DESIGN RECOMMENDATIONS ....................................................................................................................................................12
PREPARATIONS FOR INSTALLATION..............................................................................................................................................12
INSTALLATION INSTRUCTIONS.....................................................................................................................................................12
IMPORTANT!..........................................................................................................................................................................12
FIRST-TIME OPERATION ........................................................................................................................................................13
MAINTENANCE.......................................................................................................................................................................14
CHECKING THE FILTER...............................................................................................................................................................14
WINTERIZATION......................................................................................................................................................................14
REMOVING THE SCREEN AND THE DIRT COLLECTOR............................................................................................................15
RE-INSTALLING THE SCREEN AND THE DIRT COLLECTOR......................................................................................................20
PARTS SCHEDULE SECTION 1.................................................................................................................................................22
PARTS DRAWING #1 (PAGE 1 OF 2).......................................................................................................................................23
PARTS DRAWING #1 (PAGE 2 OF 2).......................................................................................................................................24
DIRT COLLECTOR - PARTS SCHEDULE ....................................................................................................................................25
DIRT COLLECTOR - PARTS DRAWING ....................................................................................................................................26
COVER - PARTS SCHEDULE.....................................................................................................................................................27
COVER - PARTS DRAWING.....................................................................................................................................................28
CONTROL TUBES SCHEME .....................................................................................................................................................29
AMIAD LIMITED WARRANTY.................................................................................................................................................30
With any inquiry please quote Filter Serial Number, located on the filter housing.

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TECHNICAL SPECIFICATIONS
General
Maximum flow rate
MG112
525 m3/h; 2313 USgpm
Consult manufacturer for optimum flow depending on
filtration degree & water quality.
Min. Working pressure
2.0 bar; 30 psi
Or lower if pressure is increased for flushing
Max. Working pressure
10 bar; 150 psi
Total Filtration area
26,670 cm²; 4,134 in²
Net Filtration area
20,400 cm²; 3,162 in²
Inlet/Outlet diameter
300 mm, 12"
Flange standards as per request.
Max. Working temperature
60 0C; 140 0F
Empty weight MG112
480 kg / 1054 lb
Flush data
Exhaust valve
40 mm; 11/2"
Three flushing valves
Flushing cycle time
45 seconds
Depending on the working pressure
Wasted water per cycle
375 liter; 105 US gallon
at 2 bar; 30 psi
Minimum flow for flushing
60 m³/h; 260 US gpm
at 2 bar; 30 psi
Flush criteria
Differential pressure of 0.5 bar; 7psi, time and manual operation
Construction materials
Filter housing
Epoxy-coated carbon steel 37-2 (St. St. 316 available on request)
Filter lid
Epoxy-coated carbon steel 37-2
Coarse screen
Reinforced nylon
Fine screen
Stainless Steel 316, molded plastic support structure
Cleaning mechanism
PVC and Stainless Steel 316L
Motor assembly
Reinforced nylon, brass, stainless steel
Hydraulic piston
Stainless Steel 316, brass
Control tubing
Polyethylene
Seals
BUNA-N
Control
Aluminum, Brass, Stainless Steel 316, PVC
Filtration degrees available
Type
Molded screen
Micron
500
300
200
130
100
80
mm
0.5
0.3
0.2
0.13
0.1
0.08

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Safety Instructions
General Safety Instructions
Amiad filtration products always operate as components in a larger system. It is essential for the system designers, installers and
operators to comply with all the relevant safety standards.
Prior to installation, operation, maintenance or any other type of action carried out on the filter, read carefully the safety,
installation and operation instructions.
During installation, operation or maintenance of the filter all conventional safety instructions should be observed in order to
avoid danger to the workers, the public or to property in the vicinity.
Please note: The filter enters into a flushing mode automatically, without prior warning.
No change or modification to the equipment is permitted without a written notification given in advance by the manufacturer or
by its representative, on the manufacturer’s behalf.
Always observe standard safety instructions and good engineering practices whilst working in the filter’s vicinity.
Use the filter only for its intended use as designed by Amiad, any misuse of the filter may lead to undesired damage and may
affect your warranty coverage. Please consult with Amiad prior to any non-regular use of this equipment.
Obey and comply with the instructions given by each safety stickers found on the filter.
Installation
General
Install the filter according to the detailed Installation Instructions provided with the filter by the manufacturer and according to
the description given in this manual.
Make sure to leave enough clearance so as to enable easy access for future treatments and safe maintenance operations.
The user should arrange suitable lighting at the area of the filter to enable good visibility and safe maintenance.
The user should arrange suitable platforms, ladders and safety barriers to enable easy and safe access to the filter without
climbing on pipes and other equipment. The user should verify that any platform, barrier, ladder or other such equipment is built,
installed and used in accordance with the relevant local authorized standards.
Check and re-tighten all bolts during commissioning and after the first week of operation.
Use only appropriate standard tools and equipment operated by qualified operators when installing, operating and maintaining
the filter.
When installation is required in hazardous environment sites, underground or high above ground, make sure that the site design
and the auxiliary equipment are appropriate and that installation procedures are carried out in accordance with the relevant
standards and regulations.
Ensure walking areas about the installation are slip free when wet.
Shipment and transporting
Shipping and transporting the filter must be done in a safe and stable manner and in accordance with the relevant standards and
regulations.
For shipping, lifting and positioning the filter, use only approved lifting equipment and authorized employees and contractors.
Electricity
Electric wiring should be performed by an authorized electrician only, using standardized and approved components.
Install a lockable main power cut-off switch close to the control panel.
If due to site constraints, the control panel is installed without a clear line-of sight of the filter, an additional lockable power
disconnect cut-off switch should be installed near each filter unit.
Installation of the filter should be performed so as to avoid direct water splashing on the electrical components or on the control
panel.

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Pneumatics
Install a lockable main cut-off switch, featured with a pressure release mechanism, on the compressed air supply line close to
the control panel.
If the control panel is installed far away and there is no eye contact with the filter, a lockable compressed air cut-off switch,
featured with a pressure release mechanism, should be installed near each filter unit.
The user should make sure that the compressed air supplied to the filter never exceeds the maximum designated pressure for
this filter. An air-pressure reduction valve should be installed on the compressed air supply line upstream of the filter’s pneumatic
inlet port.
Hydraulics
Extra safety devices should be installed on hot water applications to avoid skin burn danger.
The user should install a manual Water Cut-off Valve next to the filter’s inlet port.
In cases where the downstream piping network downstream of the filter is pressurized an additional manual Water Cut-off Valve
should be installed next to the filter outlet port.
The user should make sure that the system includes a Pressure Release / Drainage Valve to enable release of residual pressure
prior to any maintenance procedure performed on the filter.
The user should make sure that the filter is never exposed to water pressure exceeding the maximum designated pressure for this
filter, if needed a Pressure Reduction Valve should be installed upstream of the filter’s water inlet port.
Please note that the maximum working pressure indicated at the filter’s specifications table includes the pressure caused by fluid
hammer and pressure surge effects.
Civil Engineering
Make sure that the filter installation is done by Amiad qualified technicians.
Make sure that any civil engineering work at the installation site such as construction, lifting, welding, etc. is done by qualified
workers / technicians / contractors and in accordance with the relevant local standards.
While using lifting equipment, make sure that the filter or the lifted part is chained securely and in
a safe manner.
Do not leave lifted equipment if there is no necessity. Avoid working below lifted equipment.
Wear a safety helmet while using lifting equipment.
Make sure that the flooring is sloped for drainage and to avoid accumulation of liquids.
Commissioning
Read carefully the Commissioning and the First Start-up Operation instructions prior to any attempt to operate the filter.
In order to achieve maximum performance and smooth operation of the filter it is crucial to perform the Startup and First
Operation procedures exactly as described in this manual.
Commissioning the filter should be done by an authorized Amiad technician, do not attempt to commission the filter
unaccompanied since this may lead to undesired damage and may affect your warranty coverage.
Operation and Control
Do not operate the filter before reading carefully and being familiar with its operation instructions.
Observe the safety stickers on the filter and never perform any operation contradicting the instructions given.
Never operate or use the filter for purposes other than its original design and operational envelope.

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Maintenance
Before any maintenance or non-regular operation please read the following:
Servicing the filter should be done only by technicians authorized by Amiad.
Disconnect the filter from the power supply and lock the Main Power Switch.
Disconnect the compressed air supply, release the residual pressure and lock the Pneumatics Main Valve.
Disconnect the filter from the water system by closing and securing the Manual Inlet Valve. In cases where the downstream
piping network is pressurized, close and secure the Manual Outlet Valve also.
Release the residual water pressure by opening the Pressure Release / Drainage Valve.
Empty the filter by opening the Drainage Valve.
In hot water systems wait till the filter components cool off to a safe temperature.
Place warning signs around the work area as required by the local standards and procedures.
Inspect the filter’s safety stickers and replace any damaged or faded sticker.
Mechanical
When working on the filter use only appropriate standard tools.
Always open and close valves slowly and gradually.
Remove grease and fat material residues in order to avoid slipping.
Before disconnecting the filter from the water supply, electricity and pneumatics and before releasing the filter’s residual
pressure do NOT:
oloosen or unscrew bolts
oremove any protection cover
oopen any service port flange
Avoid splashing and water leakage so as to minimize slippage, electrification or damage to the equipment, caused by moisture.
While using lifting equipment, make sure that the filter or the lifted part is chained securely and in
a safe manner.
Do not leave lifted equipment if there is no necessity. Avoid working below lifted equipment.
Wear a safety helmet, goggles, gloves, and any other personal safety equipment required by the local standards and regulations.
Human entry into a filter must be done in accordance with the relevant local safety instructions, standards and regulations for
working in hazardous environment.
Manual cleaning of filter media using high water pressure or steam should be performed in accordance with the cleaning system
instructions, the local standards and regulations and without endangering the operator or the vicinity
Manual cleaning of filter element using acid or other chemical agents should be performed in accordance with the relevant
material safety instructions, the local standards and regulations and without endangering the operator or his vicinity.
Before returning to regular operation
Re-assemble any protection covers or protection mechanisms removed during service or maintenance operations.
Make sure that all the tools, ladders, lifting devices, etc. used during the maintenance procedures are taken away from the filter
area and stored
In order to return the filter to regular operation, follow the First Start-up Operation instructions as detailed in your user manual.
For filters used in potable water systems it is required to disinfect the filter according to the local water authority standards and
regulations before putting it back to service.

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Dimensional Drawings

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Introduction
General Description
The FILTOMAT MG112is a sophisticated, yet easy-to-operate automatic filter, with a self-cleaning mechanism driven by a hydraulic
turbine. It is designed to work with various types of screens in filtration degrees from 800 to 50 micron, and is available in 10"
inlet/outlet diameter.
The FILTOMAT MG112filter is configured to meet your specific needs according to flow rates and water quality. The filter can be
installed as a stand-alone unit for low flow rates, or assembled in a group on a manifold when high flow rates and/or a large screen
area are required. The filters are delivered fully assembled, requiring simple connections to the inlet and outlet, and to the drain.
Basic Filter Operation
Water enters the filter from the inlet pipe, and passes through a coarse screen, which protects the automatic cleaning mechanism from
any large particles or debris. The coarse screen is not cleaned automatically, and should not accumulate large quantities of solids. The
water then flows through a fine screen which filters out the smaller particles. Water that has passed through the fine screen is clean
and passes into the outlet pipe. Particles of dirt accumulate on the fine screen and form a “filtration cake,” which starts to restrict
water flow. As the restriction, or clogging, increases, the pressure in the outlet pipe becomes lower than in the inlet pipe. When the
pressure differential reaches a pre-set value, a self-cleaning cycle is initiated. The self-cleaning cycle takes approximately 45 seconds
and does not interrupt the flow of water through the filter.
How the Self-Cleaning Cycle Works
At a preset pressure differential (0.5 bar —7 psi), which is detected by a pressure differential switch, the flushing controller operates
pulse solenoids which allow water to flow to the relay valves, which then activate the hydraulic pistons and open a valve to the rotor
chamber (See Figures 2 below). The water from the rotor chamber flows out the drain. The pressure in the rotor chamber drops,
releasing a strong flushing stream that flows through the filter.
This drop in pressure and corresponding release of the backflush stream create a suction effect at the nozzle inlets. This effect actuates
spot cleaning directly in front of the openings of each nozzle at the inner side of the fine screen. The water and particles passing
through the hydraulic rotor cause the suction scanner to rotate, and the piston moves in an axial direction to the opposite end of the
filter.
The combination of rotational and axial movement of the suction scanner assembly ensures that the nozzles sweep the entire inner
side of the fine screen in a spiral pattern.
When the first stroke is completed, the flushing valve closes and after a short interval the flushing controller activates the second
backflush stroke. The suction scanner assembly spins, moving with the piston in the opposite direction and returning to its original
position.
This self-cleaning process takes about 45 seconds, depending on the operating pressure.
It is essential that there be at least 2 bar pressure at the inlet to the filter for proper cleaning to take place during flushing.
The flushing controller may be operated by pressure differential, manual activation, or by timer.

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Piston
Drain
Rotor
Exhaust valve
Nozzle
Dirt collector
Fine screen
Coarse screen
Inlet Outlet
Rotor chamber
Figure 2: Internal Components of the MG Filter
Diagram for the hydraulic Control tubes Routing - for illustration only

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How the Flushing Controller Works
The flushing controller is operated by 12 VDC. It receives a signal from the Differential Pressure Switch when the pressure differential
reaches the preset value (0.5 Bar, 7 PSI). The flushing controller then sends a 12 VDC pulse to the Pulse Solenoid, which provides
hydraulic pressure to the Hydraulic Relay which actuates the piston. Where there are several ganged filters, there are solenoids to
each relay valve and piston and they are activated in turn, not simultaneously, in order to maintain inlet pressure and avoid large
pressure drops. The unit can also control a downstream valve, which may be closed while flushing to increase pressure. An optional
electronic counter can keep track of the number of flushing cycles.
Parameters which may be set include:
Mode of operation: Manual, Differential Pressure (DP) only, DP with time override
Flushing cycle
Flushing time
Dwell Time
DP response delay time
Number of consecutive flushing cycles by DP, to be considered a fault
How the Hydraulic Relay Works
The hydraulic relay valve, when not actuated by hydraulic pressure from the pulse solenoid, allows pressure to pass to the hydraulic
piston, extending it, and holding the suction scanner away from filter lid. When the hydraulic relay is actuated, pressure to the piston is
shut off and the water in the piston flows out to the drain. When the piston is no longer under pressure the suction scanner pushes the
piston away from the filter lid.
The Hydraulic Relay

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Installation
Design Recommendations
The inlet and outlet pipes must be the same or a larger diameter than the inlet and outlet diameters of the filter.
The upstream pressure source should not drop below 30 psi (2 bar) during the rinse cycle. If this cannot be ensured, consult the
manufacturer.
If a prolonged pipeline fill time causes a temporary high flow and low pressure situation, it recommended that you install a
pressure sustaining valve downstream of the filter. The pressure sustaining valve will ensure a controlled fill-up of the line.
If continued water delivery is essential even during “down time” maintenance periods, it recommended that a manual or
automatic by-pass be installed, and that isolating valves be installed up and downstream of each filter unit for isolation purposes.
Shut off valves must be installed in the inlet and outlet lines to enable maintenance.
A non-return valve should be installed where water hammer or back flow may be a problem.
The filter must be installed in the direction of flow indicated by the arrow on the filter body.
Secure the drain pipe so that there is no movement during flushing.
The highest point of the drain pipe should be no more than one half meter above the filter.
The drain pipe must allow free flow and be free of restrictions.
Preparations for Installation
Ensure suitable lighting at the area of the filter to enable good visibility and safe maintenance.
Arrange suitable platforms and safety barriers to enable easy, safe access to the filter.
Allow a convenient approach and enough space for dismantling and maintenance.
Installation Instructions
Ensure the direction of flow is according to arrows marked on the filter housing
Install a drain valve in place of one of the pipe plugs in the inlet or outlet pipe on the installation manifold.
Important!
Prevent static back pressure or reverse flow through the filter.
Install a manual or a hydraulic valve downstream of the filter.
The filter may enter flushing mode automatically, without warning.

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First-time Operation
1. Remove a plastic plug from one of the outlet holes on the top of the filter to bleed air from the filter.
2. Open the inlet valve.
3. Close the plastic plug when all the air is bled from the filter.
4. Make sure the filter is clean and dry.
5. Check all fittings and flanges for leaks.
6. Open the outlet valve.
7. Perform manual flushing, by selecting “Manual” in the flushing controller.
8. Check that the inlet pressure does not drop below 2 bar during flushing.
The filter is ready for operation. Observe at least one automatic flushing cycle, activated by time or differential pressure.

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Maintenance
NOTE: Depressurize the filter before maintenance (close inlet, and then outlet valve).
Checking the Filter
1. Unscrew the filter lid's long bolt; for safety reasons do not remove its nut!
2. Unscrew and remove the other nuts from the filter’s lid bolts. Do not remove the long bolt's nut!
3. Open the lid by pulling it carefully; leave it to hang on the long bolt. Do not remove the long bolt’s nut!
4. Extract the coarse screen and clean if necessary.
5. Extract the fine screen and clean if necessary. Cleaning may be performed by hosing the screen from outside-in,
and/or with a nylon brush.
6. Check the O-rings of the fine screen and apply grease, if necessary.
7. Reassemble the fine screen and the coarse screen.
NOTE: Check that the dirt collector shaft is properly aligned in the bearing.
8. Close the filter's lid by turning it back to its original close position and fasten the nuts.
9. Perform the procedure described on the "First Operation of Filter" paragraph of this document.
Winterization
Filter operations should be suspended in climates where the filter is exposed to freezing temperatures.
1. Check that the outlet isolating valve is closed and perform two manual rinses.
2. Close the inlet valve to the filter and release the pressure.
3. Remove all drain lines from the valves and rinse controller. These should be drained of water and re-connected.
4. Remove the following items from the filter and store in a dry place:
Top lid assembly
Coarse and fine screen assembly
5. Apply grease to the O-rings of the fine screen before storing.
At the beginning of the operation season, reassemble the filter elements and check the "Preparations" and the "First
Operation of the Filter" paragraphs of this document.

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Servicing
Draining the Filter
1. Close the filter’s upstream (inlet) valve.
2. Close the filter’s downstream (outlet) valve and isolate the filter from the water system.
3. Use the manual start function of the electronic flushing controller and start a flushing cycle to release the
pressure of the filter housing.
Removing the Screen and the Dirt Collector
1. Drain the filter as described above.
2. Unscrew and remove the nuts from the filter’s lid bolts [1] but do not remove the long bolt nut! [2]
3. Open the lid by pulling it [3] and carefully leave it to hang on the long bolt [4]. Do not remove the long bolt’s nut!
Note: Attempting to remove the screen from the piston-side of the filter will cause damage to the system.
1
2
4
4
3

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4. Pull the coarse screen out of the filter housing.

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5. Pull the fine screen out of the filter housing. If it is difficult to release the screens use Amiad’s Push Pull Tool
(Catalog Number 7001900-001985) to extract the screen by performing the following procedure:
A. Assemble the tool by inserting the fork shape part into the lever handle.
B. Insert the fork shape part over the dirt collector shaft.
C. Turn the tool clockwise until the fork teeth catch the fine screen handle.
D. Lay the tip of the tool’s lever handle on one of the filter’s housing cover bolts (in order not to damage
the filter paint coating) and secure the joint pin.
E. Pull the handle firmly to release the screen.
F. Pull the screen out of the filter housing.
A
Joint Pin
Lever Handle
Fork Shape

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C
D
E
B

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6. Depending on the actual diameter of your filter use two units of Amiad’s Screen Separation Tool (Catalog
Number 700190-001985 for 2”-8” , 700190-002139 for 10”-12” or 700190-002150 for 14”-16” filters) to
separate the Chamber Flat Screen and the Dirt Collector from the Fine Screen.
F

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Re-installing the Screen and the Dirt Collector
1. Insert the Dirt Collector to the Fine Screen. Make sure that the first suction nozzle of the Dirt Collector (A) is
pointing downwards when inserted into the Fine Screen.
2. Use the two Amiad’s Screen Separation Tools to reconnect the Chamber Flat Screen and the Fine Screen.
3. Insert the fine screen back to the filter housing (A). Use the fork part of the Push Pull Tool to lift the screen and
push it through the last few centimeters till it is correctly seated in the filter housing (B).
A
A